Valve



L M. C, SCHWEWEHT,

mvf.

milf m5. 17.1909.

Patented Ma H. P. KRAFT AN APPUCA'HQN INVE NT@ M HGF-E l. il

i fr

VALVE,

Specification oiLietters latent.

Patented they Tita Applemanl mei' February i7, iena. serial ire.erases.,

To `all whom t may concern-v:

nBe it known that We, HENRY KRAFT?,

residing in the borough of Bi'ooklyn,xcounty oflings, city and State oiNew York, and

Mairisiiiiniiv CHARLES Slcriwitiiviiiir, residing in lNest Hoboken,inthe county oli Hudson' and State oi'Nevv Jersey, both'citizens ot' theUnited States, have jointly invented certain new 4and useful lImprovements in Valves, of which the 4followingfis a specification.

y This invention aiins to'r provide certain" improvements especiallyapplicable to pressuite indicating valvesl for pneumatic tires,

the invention and applicable4 also in Whole or in 'part to valves'forvarious other purposes. y

The accompanying drawings illustrate an embodiment of the invention:

liigures '1; 2, 3 and 'd are dianietial sec! tions vot diicerentftypesat valve embodying llig. 5. is a cross-section on the line i-Afof l.Except as indicatedi'n Fig. 55th@ parts are generally of circularcross-sectionu Referring to the einbodinients ofthe inveiitionillustrated, the valve shell A. carries l the usual parts of an ordinaryor suitable l to. indicate `the pressure within the tire;k

tire valve such as the valve proper, seat, spring, Steins, 6to., of thecomiiion Schrader valve illustrated in Fig. 1, which are sur-V roundedby an outer tube B which is threaded on theoutside to receive a dustcapcoverthe entire valve shell, and which is provided with iiat outer faces,to prevent its turning in the rim oit the Wheehthese `tealtures being;common. ,y

tube directly surrounds the The outer n upper part oit theA valve shellA Witha good slidingvit, so that the latter may slide out oit the endoit the outer tubeB -su'fliciently the valve Shel A being yieldinglyheld down in the outer tube by ineans of one or niore helicoidal springsand l), and by ineens oi an elastic tubel through which an air-` tighte'oriiinunicating,1 passage is provided f .4. 1.. i rioni the valveshell to the inteiiot of the The arrangement Gr and the part the'details of these v. i yielding connections are irnportantin the" to theconstruction voit Fig.

l, the valve shell A is'provided With' a nipple F of reducedcross-section permitting the 55 use oi" a straight outer tube B, and yetleaving a sucieiit annular space for the attach# ing devices hereinafterreferred' to.- .The outer end 'of vthe elastic. tube l is, fastened onthe 'nipple l?, preferably by corrugating 60 the, latter and stretchingthe v`tube' over the saine (and Wrapping the tube if necessary). Thesprings G and 'D are attached to the valve shell by means`ii'idepeiident of the 4connection between the shell and the elastic 65tube, as for ex'ainjle by the screv'vl threads of Figs; 2- andh o i' byan attaching ring G ig. l.) which is screwed its upper end to a portionH ol: the valve shell which is of intermediate cioss-sectioiilietweenthat 70 'of the nipple F and the upper" part of the shell.' lhespriiig-C is attached to the attaching ring G by screwingn the spring on the'outside thereof9 vthe reduction ota crossi, section from the portion Hot the valve shell -75 to the nipple F permitting a correspondingI '1'reduction ofthe lower part of the attaching, 'ring Cv.) so as to mairerooni vlor the spring' C betweenthe attaching' ringand the outer tube B.rlChus the connection'iioin the outer S0 springto the shell through therin-g Gr extends above the connection of the elastic `tube.- The. innerspring D has its convolution's arranged closeftogether so as to prel'vent or'inaterially limit diametral epan-a `Within 'the lower Yendofthe attaching ring, i

where the' attaching 'ring` entends belovv the valve shella so vthatthereis plenty o rooin. 'lhe attaching ineinber G is suitably groovedorythreaded to perinit the screwingI oit the springs thereon. Theattaching ring Gr is shouldered `on the inside to correspond 4with thevreductionin cross-section between the 95 parts l-l and llf of thevalve-hell7 and the elastic tube E, preferably ends upward l suicientlytohave its ends pinched oici 'flat between the shoulders of theattaching ring 1 Y Y Q10@ The construction may be sonievvhatsiinpliiriedby oniitting1 the spring and using*4 a single spring Cas in Figs. 2 -and3,v 'andin this'case the spring may be attached to theintermediateportion H et the valve shell 3.05 directly by screwing1 itupon suitable threads thereon. The nipple F is attached to the end ofthe elastic tube Eby merely extending the tube overth'e corrugatedoutersurface ofthe nipple and vwrapping it'thereonz withA wire ythread or thelike. y

ends .of the elastic tube and the springs, is

important in vorder tojobtainnsimplicity and cheapness, and thesameftime preserve an air-tight connection; llor'th'is .purposepretlerably the constructions in' lligs." 1,2 andVv 3 are employed, 'inwhichthe inner fendot the tube isi-provided withjanoutward flange `whichis clampedbetween` "two suitable.

membersf i In the cons tructivon shown "in Fig'. ,il .springs C and@have their innerend's astened tofthimbles il and l respect1vely by`means of screwthreadspa's the upper ends,

y L and M, which` take under' a"shoi1lder upon a Alined membersuch asthe head N on the.'

and these thimblesareprovided `with flanges inner endof thtvv outer tubei3.' `Thel vflange O atthe inner 'end ot the "elastic tube E is' clampedbetween said lined member together with the flangesla and 'lli/i bymeans ofia* Y nut l screwing into athreaded' socket ,in

the member Nr f 'In the construction oil-Fig. 2, the ,shoulder Q- whichsupports the thimble 'llcarrfing the spring, is provided in ,the.portionotthe Vouter tube B beyond the head ll, y'the flange O of the elastictube alone is' clamped j between said member N andth'enut P;

In the construction of 3 the shoul der Q and thimble ql. arethesame 'asin Fig. 2. .The flange U whfichjsjprovided is a metallic llange onl athinible llt having' upper end. llVith this construction, in order forthe lower end with the elastic tube E,

a corrugated exterior upon which tlietube 1s forced and wrapped the sameas at-its to insure an airtight joint, it is advisable to introducenpacking ring S of rubber,

leather, or other packing material between the flange4 O and the nut P.

Any one of the connections illustrated for the upper ends olf theelastic tube and vsprings maybe used, either with or with-,

out the particular style of connections previously described for theinner ends. example instead'lof providing a iiange 'at the inner end ofthe elastic tube which is clamped in place to'hold it tast, the con was' The manner Lci attachment ot thelowerl Fory upon the outer tube ld andpressing 'down vupon the Ytop of 'the valve cap U. (Fig. l} to preventyielding or" the springs and stretching of the vinner tube except whenthe tire is lirst pumped up, so as to save strain en said v spriiflgsZandy tube. .it is nadvisable however 1, to press as hard upon the topof the cap as .would sometimes be the, case with this arrangement, andwepropose to use a restrain- 'ving devic'ewh-ich 'shall avoid'any strainon the-cap byacting upon the valve shell A.. ilor'this purpose a ringVis' provided hav- 'fing-'al thread which it vmay, be introduced-overthe end ot' the valve' shell, vand seating/upenn shoulder TW on'saidshelh its 'lower endl being threaded to` enter a threaded'socket'in tlie'ftire of the outer tube B. simply unscrewing therestraining ring LV, the apparatus isjlree to yield to'indicate theinternalpressure,or by pressing down and screwinglin' the ring -Vtheparts arev held in 4their nordnal unstrained position.

ln order to' 1 prevent the lvalve shell A from rotatingin `the outertube'hB, a ,slight 'projection Y (Figi-i5) is preferably formed 4intheouter tube? entering a longitudinal groove `Z in the yvalveshell.1What wev claim is'z.- l l." llaa pressure indicating tire valve, the

"combination of a tube, a valve shell' adapted f to have movementlongitudinally ihn 'said ."tubve, having an extension at its lower endof two reduced diameters, the lower portion ot the extension being ofless diameter than the portion above it,^an elastic tube connectedtoonereduced'portion of said shell andtozsaid tube vand a. coiled springconnection between the other reduced portion of said shell and saidtube, whereby said elastic ...tube may be connected to saidshellinde'pendently of said coiled spring connection.

2. ln a pressureindicating tire valve, the

'ill

combination of a tube, a valve shell adapted `to have'v movementlongitudinally in said tube, having an `extension at its lower end oftwo reduceddiameters, the lower portion of theextension being of lessdiameter than the portionabove. it, an elastic tube connected to themore reduced portion of said shellY andto said tube, and a coiled springconnection between the lessl reduced portion of said shell and saidtube, surrounding said elastic tube, whereby said 'elastic tube. may

be connected to said shell independently of said coiled springconnection.

3. ln a pressure indicating tire valve, the combination of a tube, avalve shell adapted to move longitudinally in said tube having a bodyportion'of substantially the saine external diameter as the internaldiameter of said tube, and an extension of less diameter 'than bodyportion upon its lower end constituting a nipple, and an elastic tubeand a coiled spring connection between said..

tube and the nipple of said shell.

shoulder at its lower end, a valve shell.

4. In a pressure indicating tire valve, the -combination of a tube, avalve shell adapted to have movement longitudinally in said tube havingan extension at its lower end of two reduced diameters, the lowerportion of the extension'being of less diameter than the portion aboveit, an elastic tube connected to the more reduced portion of said shelland to said tube, a sleeve connected to the less reduced portion of saidshell, and a plurality of coiled springs connected to said sleeve andsaid tube, whereby said elastic tube and springs are connected to saidshell independently of one another.

5. In a pressure indicating tire valve, the combination' of a tubehaving an internal adapted to have movement longitudinally Ain saidtube, an elastic tube connected to said valve shell and tube, and a nuton the interior of said tube clamping said tube between it and saidshoulder in saidtube.

6. In a pressure indicating tire valve, the combination of a tube havingan internal shoulder at its lower end, a valve shell adapted to havemovement longitudinally in said tube, an elastic tube provided with anoutward flange at its lower end connected to said valve shell and tube,and a nut on the interior of said tube clamping the flange V(tube forretaining said shell against movement.

8. In combination, a valve shell having 'at its inner end a nipple ofreduced crosssection and anelastic tube fastened at one end on saidnipple and adaptedV to maintain communication between said shell and apneumatic tire, and an outer tube surrounding the larger portion otsaidshell and adapted forA connection to said tire, the attaching meanscomprising a ring connected to the shell above the end of the elastictube and to the spring.

lIn witness whereof we have hereunto signed our names in the presenceoftwo subscribing witnesses.

HENRY Pn KRAFT. MAXIMILIAN CHARLES SCHWEINERT.

Witnesses:

EUGENE V. MYERS, THEoDoRE T. SNELL.

